diff --git a/trunk/src/app/srs_app_rtc_codec.cpp b/trunk/src/app/srs_app_rtc_codec.cpp
index 7c0db4454..061debfab 100644
--- a/trunk/src/app/srs_app_rtc_codec.cpp
+++ b/trunk/src/app/srs_app_rtc_codec.cpp
@@ -395,7 +395,7 @@ srs_error_t SrsAudioRecode::transcode(SrsSample *pkt, char **buf, int *buf_len,
     int decode_len = kPacketBufMax;
     static char decode_buffer[kPacketBufMax];
     if ((err = dec_->decode(pkt, decode_buffer, decode_len)) != srs_success) {
-        return srs_error_new(ERROR_RTC_RTP_MUXER, "decode error");
+        return srs_error_wrap(err, "decode error");
     }
 
     if (!resample_) {
@@ -419,7 +419,7 @@ srs_error_t SrsAudioRecode::transcode(SrsSample *pkt, char **buf, int *buf_len,
     int resample_len = kFrameBufMax;
     static char resample_buffer[kFrameBufMax];
     if ((err = resample_->resample(&pcm, resample_buffer, resample_len)) != srs_success) {
-        return srs_error_new(ERROR_RTC_RTP_MUXER, "resample error");
+        return srs_error_wrap(err, "resample error");
     }
 
     n = 0;
@@ -446,7 +446,7 @@ srs_error_t SrsAudioRecode::transcode(SrsSample *pkt, char **buf, int *buf_len,
             pcm.size = size_;
             static char encode_buffer[kPacketBufMax];
             if ((err = enc_->encode(&pcm, encode_buffer, encode_len)) != srs_success) {
-                return srs_error_new(ERROR_RTC_RTP_MUXER, "encode error");
+                return srs_error_wrap(err, "encode error");
             }
 
             memcpy(buf[n], encode_buffer, encode_len);
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index 3fa14461e..39eb011ce 100644
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -539,7 +539,7 @@ srs_error_t SrsInotifyWorker::start()
     }
 
     if (((err = srs_fd_closeexec(fd))) != srs_success) {
-        return srs_error_new(ERROR_INOTIFY_OPENFD, "closeexec fd=%d", fd);
+        return srs_error_wrap(err, "closeexec fd=%d", fd);
     }
 
     // /* the following are legal, implemented events that user-space can watch for */
diff --git a/trunk/src/kernel/srs_kernel_rtc_rtcp.cpp b/trunk/src/kernel/srs_kernel_rtc_rtcp.cpp
index 785d21eef..e5e657d94 100644
--- a/trunk/src/kernel/srs_kernel_rtc_rtcp.cpp
+++ b/trunk/src/kernel/srs_kernel_rtc_rtcp.cpp
@@ -1032,7 +1032,7 @@ srs_error_t SrsRtcpTWCC::process_pkt_chunk(SrsRtcpTWCC::SrsRtcpTWCCChunk& chunk,
         return err;
     }
     if ((err = encode_chunk(chunk)) != srs_success) {
-        return srs_error_new(ERROR_RTC_RTCP, "encode chunk, delta_size %u", delta_size);
+        return srs_error_wrap(err, "encode chunk, delta_size %u", delta_size);
     }
     add_to_chunk(chunk, delta_size);
     return err;
@@ -1118,7 +1118,7 @@ srs_error_t SrsRtcpTWCC::do_encode(SrsBuffer *buffer)
         // FIXME 24-bit base receive delta not supported
         int recv_delta_size = (delta >= 0 && delta <= 0xff) ? 1 : 2;
         if ((err = process_pkt_chunk(chunk, recv_delta_size)) != srs_success) {
-            return srs_error_new(ERROR_RTC_RTCP, "delta_size %d, failed to append_recv_delta", recv_delta_size);
+            return srs_error_wrap(err, "delta_size %d, failed to append_recv_delta", recv_delta_size);
         }
 
         pkt_deltas_.push_back(delta);
diff --git a/trunk/src/protocol/srs_rtmp_stack.cpp b/trunk/src/protocol/srs_rtmp_stack.cpp
index f56fcdcb4..f80cf77cd 100644
--- a/trunk/src/protocol/srs_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_rtmp_stack.cpp
@@ -3977,7 +3977,7 @@ srs_error_t SrsPlayPacket::decode(SrsBuffer* stream)
     
     SrsAmf0Any* reset_value = NULL;
     if ((err = srs_amf0_read_any(stream, &reset_value)) != srs_success) {
-        return srs_error_new(ERROR_RTMP_AMF0_DECODE, "reset");
+        return srs_error_wrap(err, "reset");
     }
     SrsAutoFree(SrsAmf0Any, reset_value);